Acetic acid (2R,3S,4S,5R,6R)-4-benzyloxy-5-[(2S,3R,4R,5R,6R)-4,5-bis-benzyloxy-6-benzyloxymethyl-3-(2,2,2-trichloro-acetylamino)-tetrahydro-pyran-2-yloxy]-6-hydroxymethyl-2-(4-methoxy-phenoxy)-tetrahydro-pyran-3-yl ester 、 Bn(-2)[Bn(-3)][Bn(-4)][Bn(-6)]Man(a1-2)[Bn(-3)][Bn(-4)][TBDPS(-6)]Man(a1-2)[Bn(-3)][Bn(-4)][Bn(-6)]Man(a)-O-C(NH)CCl3 在
三氟甲磺酸三甲基硅酯 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
以65%的产率得到[(2R,3S,4S,5R,6R)-5-[(2S,3R,4R,5R,6R)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)-3-[(2,2,2-trichloroacetyl)amino]oxan-2-yl]oxy-6-[[(2S,3S,4S,5R,6R)-3-[(2R,3S,4S,5R,6R)-6-[[tert-butyl(diphenyl)silyl]oxymethyl]-4,5-bis(phenylmethoxy)-3-[(2R,3S,4S,5R,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxymethyl]-2-(4-methoxyphenoxy)-4-phenylmethoxyoxan-3-yl] acetate